<!doctype html>
<title>Calculator</title>

<script>

add(12, 6);
subtract(67, 45);
multiply(34, 26);
divide(100, 5);

function add(firstNumber, secondNumber)
{
  var total = firstNumber + secondNumber;
  console.log(total); 
}
	
function subtract(firstNumber, secondNumber)
{
  var difference = firstNumber - secondNumber;
  console.log(difference); 
}
	
function multiply(firstNumber, secondNumber)
{
  var product = firstNumber * secondNumber;
  console.log(product); 
}
	
function divide(firstNumber, secondNumber)
{
  var quotient = firstNumber / secondNumber;
  console.log(quotient); 
}

</script>